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Euclid is a European Space Agency telescope launched in July 2023. It is conducting a wide and deep survey over almost a third of the sky, with spectra and high-resolution imaging in optical and near-infrared bands. Euclid will have a significant impact on almost all areas of astronomy, far beyond the core cosmological science of the mission.

In March 2025, Euclid released its first major data release, ‘Quick Release 1’ (Q1), amounting to 63 square degrees of data. Q1 has already provided a wealth of exciting scientific results. These include the discovery of strong gravitational lensing systems, the exploration of galaxy clusters and the cosmic web, the characterization of active galactic nuclei and quasars, studies on galaxy evolution and morphology, and the identification of numerous dwarf galaxies and transients. These results are described in a series of 34 scientific papers published alongside the data.

This RAS Specialist Discussion Meeting gives the UK astronomy community a first opportunity to discuss the Q1 release, with talks from leading Euclid Consortium scientists who have been at forefront of the analysis.

Schedule:

10:00 - 10:30 Coffee

10.30 - 10.35 Welcome (Alex Hall, University of Edinburgh)

10.35 - 11.00 Chris Conselice (University of Manchester)

Overview of Euclid Q1

11.00 - 11.25 Steven Bamford (University of Nottingham)

Intracluster Light in Q1 clusters

11.25 - 12.05 Federica Ricci (Roma Tre University)

A glimpse of Active Galactic Nuclei science with Euclid Q1

12.05 - 12.30 Teresa Matamoro Zatarain (University of Bristol)

Searching for Active Galactic Nuclei in the Euclid Q1 data

12.30 - 13.00 Cressida Cleland (APC, Paris)

The effect of the local environment on galaxy evolution in Euclid Q1

13:00 - 14:00 Lunch

14.00 - 14.20 Natalie Lines (University of Portsmouth)

Searching for strong gravitational lenses with machine learning

14.20 - 14.40 Phil Holloway (University of Oxford)

Strong Lens Finding with Citizen Science and Ensemble Classification

14.40 - 15.00 Tian Li (University of Portsmouth)

Double Source Plane Lens search in Euclid Q1

15.00 - 15.30 Chris Duffy (Lancaster University)

Photometric Studies of known transients with Euclid

15:30 - 16:00 Tea

16:00 - 17:30 RAS AGM (Fellows only)

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